Cuvette for a water analysis instrument



FIG. 1 is a perspective view of the ornamental design for a cuvette for a water analysis instrument.

FIG. 2 is a bottom view thereof.

FIG. 3 is a top view thereof.

FIG. 4 is a front view thereof.

FIG. 5 is a back view thereof.

FIG. 6 is a right view thereof; and,

FIG. 7 is a left view thereof.

The portion of the cuvette shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a cuvette for a water analysis instrument, as shown and described. 